1⼀2:1⼀5=3⼀4:解比例X?

2024-11-29 04:06:34
推荐回答(1个)
回答1:

解由1/2:1/5=3/4:x
则1/2×x=1/5×3/4
即1/2x=3/20
解得x=3/10.